MATHEMATIC MODEЕLING OF NONLINEAR-INELASTIC BASE-FOUNDATION CONTACT PROBLEM

Calculation of buildings, that isn’t carrying non-uniform deformation, is going to definition of foundation displacement and calculation of their elements hardness and sustainability. In that case we don’t pay attention on building and base cooperative deformations. Another view we can see in case of building calculation with hard geological conditions. Base of such buildings is uneven compressible soils or displacement carrying soil. Calculation of these constructions is impossible without building and base mutual influence consideration. One of the most important calculation parameters in cooperative deformation equations is base stiffness factor. Purpose. Purpose is to define peculiar properties of self-regulation foundation calculation in case of non-uniform base deformation by the variable base stiffness factor. Conclusion. Analysis of modern construction calculation methods with deformation soil properties demonstrated that variable base stiffness factor method employment is the most reasonable for solution of undermined base and foundation interaction problem. Besides, we need to take into account variable base stiffness factor decrease depended on relative horizontal extension deformation value. Nonlinear-inelastic soil diagram application for calculation of construction with hard geological conditions lead to main deformation 50% decrease compared with elastic calculation depended on “base ? foundation ? building” structure stiffness.